$LAST_SUBMATCH_RESULT
$^M By default, running out of memory is an untrappable, fatal error. However, if suitably built, Perl can use the contents of
$; The subscript separator for multidimensional array emulation. If you refer to a hash element as
%OS_ERROR
$UID
ARGV The special filehandle that iterates over command-line filenames in @ARGV . Usually
$FORMAT_LINES_LEFT
$ARG
$SYSTEM_FD_MAX
$RS
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